C# 使用不同的线程更新GUI(WPF)
这里有个问题,我不知道怎么解决。我正在做一个小项目,其中涉及一个图形用户界面和串行数据。GUI由主线程运行,由于保存传入串行数据的数据变量需要不断更新,因此这些变量将在第二个线程中更新。问题是当我需要更新GUI上的一些文本框时,这些文本框需要使用来自辅助线程的数据进行更新,这就是我的问题所在。我不能直接从次线程更新它们,我也不知道如何从次线程传输数据,并制定出一个从主线程更新它们的系统。我把我的代码放在下面: 任何帮助都会很好C# 使用不同的线程更新GUI(WPF),c#,multithreading,user-interface,sharing,C#,Multithreading,User Interface,Sharing,这里有个问题,我不知道怎么解决。我正在做一个小项目,其中涉及一个图形用户界面和串行数据。GUI由主线程运行,由于保存传入串行数据的数据变量需要不断更新,因此这些变量将在第二个线程中更新。问题是当我需要更新GUI上的一些文本框时,这些文本框需要使用来自辅助线程的数据进行更新,这就是我的问题所在。我不能直接从次线程更新它们,我也不知道如何从次线程传输数据,并制定出一个从主线程更新它们的系统。我把我的代码放在下面: 任何帮助都会很好 using System; using System.Collect
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.IO;
using System.IO.Ports;
using System.Threading;
namespace GUIBike
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public static string inputdata;
public static int MaximumSpeed, maximumRiderInput, RiderInput, Time, CurrentSpeed, DistanceTravelled, MaximumMotorOutput, MotorOutput, InputSpeed;
public static string SaveDataString;
public Thread Serial;
public static SerialPort SerialData;
public static string[] portlist = SerialPort.GetPortNames();
public static string[] SaveData = new string[4];
public static string directory = "C:\\";
public MainWindow()
{
Serial = new Thread(ReadData);
InitializeComponent();
int Count = 0;
for (Count = 0; Count < portlist.Length; Count++)
{
ComPortCombo.Items.Add(portlist[Count]);
}
}
private void StartDataButton_Click(object sender, RoutedEventArgs e)
{
SerialData = new SerialPort(ComPortCombo.Text, 19200, Parity.None, 8, StopBits.One);
SerialData.Open();
SerialData.WriteLine("P");
Serial.Start();
StartDataButton.IsEnabled = false;
EndDataButton.IsEnabled = true;
ComPortCombo.IsEnabled = false;
CurrentSpeed = 0;
MaximumSpeed = 0;
Time = 0;
DistanceTravelled = 0;
MotorOutput = 0;
RiderInput = 0;
SaveData[0] = "";
SaveData[1] = "";
SaveData[2] = "";
SaveData[3] = "";
SaveDataButton.IsEnabled = false;
if (SerialData.IsOpen)
{
ComPortStatusLabel.Content = "OPEN";
SerialData.NewLine = "/n";
SerialData.WriteLine("0");
SerialData.WriteLine("/n");
}
}
private void EndDataButton_Click(object sender, RoutedEventArgs e)
{
SerialData.Close();
SaveDataButton.IsEnabled = true;
SerialData.WriteLine("1");
SerialData.WriteLine("0");
if (!SerialData.IsOpen)
{
ComPortStatusLabel.Content = "CLOSED";
}
int i = 0;
for (i = 0; i < 4; i++)
{
if (i == 0)
{
SaveDataString = "MaximumSpeed during the Ride was = " + Convert.ToString(MaximumSpeed) + "m/h";
SaveData[i] = SaveDataString;
}
if (i == 1)
{
SaveDataString = "Total Distance Travelled = " + Convert.ToString(DistanceTravelled) + "m";
SaveData[i] = SaveDataString;
}
if (i == 2)
{
SaveDataString = "Maximum Rider Input Power = " + Convert.ToString(maximumRiderInput) + "Watts";
SaveData[i] = SaveDataString;
}
if (i == 3)
{
SaveDataString = "Maximum Motor Output Power = " + Convert.ToString(MaximumMotorOutput) + "Watts";
SaveData[i] = SaveDataString;
}
}
}
private void SaveDataButton_Click(object sender, RoutedEventArgs e)
{
//File.WriteAllBytes(directory + "image" + imageNO + ".txt", ); //saves the file to Disk
File.WriteAllLines(directory + "BikeData.txt", SaveData);
}
public void ReadData()
{
int counter = 0;
while (SerialData.IsOpen)
{
if (counter == 0)
{
//try
//{
InputSpeed = Convert.ToInt16(SerialData.ReadChar());
CurrentSpeed = InputSpeed;
if (CurrentSpeed > MaximumSpeed)
{
MaximumSpeed = CurrentSpeed;
}
SpeedTextBox.Text = "Current Wheel Speed = " + Convert.ToString(CurrentSpeed) + "Km/h";
DistanceTravelled = DistanceTravelled + (Convert.ToInt16(CurrentSpeed) * Time);
DistanceTravelledTextBox.Text = "Total Distance Travelled = " + Convert.ToString(DistanceTravelled) + "Km";
//}
//catch (Exception) { }
}
if (counter == 1)
{
try
{
RiderInput = Convert.ToInt16(SerialData.ReadLine());
if (RiderInput > maximumRiderInput)
{
maximumRiderInput = RiderInput;
}
RiderInputTextBox.Text = "Current Rider Input Power =" + Convert.ToString(RiderInput) + "Watts";
}
catch (Exception) { }
}
if (counter == 2)
{
try
{
MotorOutput = Convert.ToInt16(SerialData.ReadLine());
if (MotorOutput > MaximumMotorOutput)
{
MaximumMotorOutput = MotorOutput;
}
MotorOutputTextBox.Text = "Current Motor Output = " + Convert.ToString(MotorOutput) + "Watts";
}
catch (Exception) { }
}
counter++;
if (counter == 3)
{
counter = 0;
}
}
}
private void ComPortCombo_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
StartDataButton.IsEnabled = true;
}
private void Window_Closed(object sender, RoutedEventArgs e)
{
if (SerialData.IsOpen)
{
SerialData.Close();
}
}
使用系统;
使用System.Collections.Generic;
使用System.Linq;
使用系统文本;
使用System.Windows;
使用System.Windows.Controls;
使用System.Windows.Data;
使用System.Windows.Documents;
使用System.Windows.Input;
使用System.Windows.Media;
使用System.Windows.Media.Imaging;
使用System.Windows.Navigation;
使用System.Windows.Shapes;
使用System.IO;
使用System.IO.Ports;
使用系统线程;
名称空间导向自行车
{
///
///MainWindow.xaml的交互逻辑
///
公共部分类主窗口:窗口
{
公共静态字符串输入数据;
公共静态int最大速度、最大行车输入、行车输入、时间、当前速度、行驶距离、最大电机输出、电机输出、输入速度;
公共静态字符串SaveDataString;
公共线程序列;
公共静态串行端口串行数据;
公共静态字符串[]端口列表=SerialPort.GetPortNames();
公共静态字符串[]SaveData=新字符串[4];
公共静态字符串directory=“C:\\”;
公共主窗口()
{
串行=新线程(读取数据);
初始化组件();
整数计数=0;
for(Count=0;Count最大速度)
{
最大速度=当前速度;
}
SpeedTextBox.Text=“当前车轮速度=“+Convert.ToString(当前速度)+”Km/h”;
行驶距离=行驶距离+(转换为NT16(当前速度)*时间);
DistanceTraveledTextBox.Text=“行驶的总距离=“+Convert.ToString(DistanceTraveled)+”Km”;
//}
//捕获(异常){}
}
如果(计数器==1)
{
尝试
{
RiderInput=Convert.ToInt16(SerialData.ReadLine());
如果(RiderInput>maximumRiderInput)
{
public delegate void UpdateTextCallback(string message);
private void TestThread()
{
for (int i = 0; i <= 1000000000; i++)
{
Thread.Sleep(1000);
richTextBox1.Dispatcher.Invoke(
new UpdateTextCallback(this.UpdateText),
new object[] { i.ToString() }
);
}
}
private void UpdateText(string message)
{
richTextBox1.AppendText(message + "\n");
}
private void button1_Click(object sender, RoutedEventArgs e)
{
Thread test = new Thread(new ThreadStart(TestThread));
test.Start();
}
public void ReadData()
{
int counter = 0;
while (SerialData.IsOpen)
{
if (counter == 0)
{
//try
//{
InputSpeed = Convert.ToInt16(SerialData.ReadChar());
CurrentSpeed = InputSpeed;
if (CurrentSpeed > MaximumSpeed)
{
MaximumSpeed = CurrentSpeed;
}
SpeedTextBox.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal,
new Action(delegate() { SpeedTextBox.Text = "Current Wheel Speed = " + Convert.ToString(CurrentSpeed) + "Km/h"; });//update GUI from this thread
DistanceTravelled = DistanceTravelled + (Convert.ToInt16(CurrentSpeed) * Time);
DistanceTravelledTextBox.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal,
new Action(delegate() {DistanceTravelledTextBox.Text = "Total Distance Travelled = " + Convert.ToString(DistanceTravelled) + "Km"; });//update GUI from this thread
//}
//catch (Exception) { }
}
if (counter == 1)
{
try
{
RiderInput = Convert.ToInt16(SerialData.ReadLine());
if (RiderInput > maximumRiderInput)
{
maximumRiderInput = RiderInput;
}
RiderInputTextBox.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal,
new Action(delegate() { RiderInputTextBox.Text = "Current Rider Input Power =" + Convert.ToString(RiderInput) + "Watts"; });//update GUI from this thread
}
catch (Exception) { }
}
if (counter == 2)
{
try
{
MotorOutput = Convert.ToInt16(SerialData.ReadLine());
if (MotorOutput > MaximumMotorOutput)
{
MaximumMotorOutput = MotorOutput;
}
MotorOutputTextBox.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal,
new Action(delegate() { MotorOutputTextBox.Text = "Current Motor Output = " + Convert.ToString(MotorOutput) + "Watts"; });//update GUI from this thread
}
catch (Exception) { }
}
counter++;
if (counter == 3)
{
counter = 0;
}
}
}
new Thread(() =>
{
while (...)
{
SomeTextBox.Dispatcher.BeginInvoke((Action)(() => SomeTextBox.Text = ...));
}
}).Start();
Public Void UpdateUI()
{
//Here update your label, button or any string related object.
//Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.Background, new ThreadStart(delegate { }));
Application.Current.Dispatcher.Invoke(DispatcherPriority.Background, new ThreadStart(delegate { }));
}
myTextBlock.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal,
new Action(delegate()
{
myTextBlock.Text = Convert.ToString(myDataObject.getMeData());
}));
private void Window_Loaded(object sender, RoutedEventArgs e)
{
new Thread(DoSomething).Start();
}
public void DoSomething()
{
for (int i = 0; i < 100000000; i++)
{
this.Dispatcher.Invoke(()=>{
textbox.Text=i.ToString();
});
}
}
<Window x:Class="WpfThreading.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfThreading"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="216.84">
<Grid Margin="0,0,2,0">
<Button Content="Button" HorizontalAlignment="Left" Margin="10,10,0,0"
VerticalAlignment="Top" Width="75" Click="Button_Click"/>
<TextBox HorizontalAlignment="Left" Margin="10,35,0,10" TextWrapping="Wrap" Name="mtextBox" Width="87" VerticalScrollBarVisibility="Auto"/>
<TextBox HorizontalAlignment="Left" Margin="111,35,0,10" TextWrapping="Wrap" x:Name="mtextBox2" Width="87" VerticalScrollBarVisibility="Auto"/>
</Grid></Window>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
new Thread(DoSomething).Start();
new Thread(DoSomething2).Start();
}
public void DoSomething()
{
for (int i = 0; i < 100; i++)
{
Dispatcher.BeginInvoke(new Action(() => {
mtextBox.Text += $"{i.ToString()}{Environment.NewLine}";
}), DispatcherPriority.SystemIdle);
Thread.Sleep(100);
}
}
public void DoSomething2()
{
for (int i = 100; i > 0; i--)
{
Dispatcher.BeginInvoke(new Action(() => {
mtextBox2.Text += $"{i.ToString()}{Environment.NewLine}";
}), DispatcherPriority.SystemIdle);
Thread.Sleep(100);
}
}
}